Jaxb-calling Marshal

Only a handful of source code lines was required to make a JAXB Marshaller object write a document tree as an XML file. First you obtain a from Marshaller a JAXBContext . Then, you might set a number of properties, such as the one that's used below, which requests nice formatting of the XML t Ext. Other properties concern the inclusion of a schema location as an attribute in the top-level element, or the encoding in T He XML Prolog. The first argument must are an object, a root element of either a, as defined by your schema, or a JAXBElement<?> .

 import  java.io.* import  javax.xml.bind.* Writedocument (Object document, String pathname)  throws   Jaxbexception, IOException {Class  <T> clazz = Document.getvalue ().    GetClass ();    Jaxbcontext context  = jaxbcontext.newinstance (Clazz.getpackage (). GetName ());    Marshaller m  = Context.createmarshaller ();    M.setproperty (Marshaller.jaxb_formatted_output, boolean.true); M.marshal (document,  new   FileOutputStream (pathname));}  

Sometimes marshalling needs to be do not only for one or both root documents but for obj ECTs of many different schema types . Could, of course, add  xsd:element  definitions for all of them to the top level  xsd:s Chema  element, but the is cumbersome. A generic solution is presented below. the method wraps an arbitrary element of some type  T  into a < Code>jaxbelement<t> .

 <T> jaxbelement<t> wrap (string ns, string tag, T o) {QName Qtag = new   QName (ns, tag);    Class  <?> clazz = O.getclass (); @SuppressWarnings ( "Unchecked" ) jaxbelement  <T> jbe = new   Jaxbelement (Qtag, Clazz, O);  return   Jbe;}  

To use it, you must create a context capable of handling all the classes that might crop up as instantiations for T . Creating A for JAXBContext several packages or classes are explained in section the JAXB Context.) With a Marshaller m obtained from this context, the application of was as simple as this wrap :

SomeType st = ...; Jaxbelement"http://www.acme.com", "Sometag", St); M.marshal (JBX, System.out);

Jaxb-calling Marshal